Updated project metadata. We examined the complexity of replication fork composition upon DNA damage by employing a PCNA-based proteomic screen to uncover known and new players involved in replication and replication stress response. We used camptothecin or ultraviolet radiation, that lead to fork-blocking lesions, to establish a comprehensive proteomics map of the replisome under such replication stress conditions. We identified and examined two potential candidate proteins WIZ and SALL1 for their roles in DNA replication and replication stress response.